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asphaltene |
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asphaltene [a′sfȯl‚tēn] (materials) Any of the dark, solid constituents of crude oils and other bitumens which are soluble in carbon disulfide but insoluble in paraffin naphthas; they hold most of the organic constituents of bitumens. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Asphaltenes are naturally occurring by-products that develop as fuel oxidizes during storage. The methylene chloride extract was concentrated by rotoevaporation, and asphaltenes (insoluble, aromatic chemicals with nitrogen, oxygen, and sulfur heteroatoms) were precipitated by adding 25 mL hexane and shaking. D-0 is characterized by high purity due to the nature of the process: Frequent sources of impurities do not arise, such as non-volatile asphaltenes or crude oil impurities, badly atomized oil droplets, oil droplets which have hit the reactor wall or particles of the reactor lining. |
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